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Vu Thanh Tra, Jhih-Wei Chen, Po-Cheng Huang, Bo-Chao Huang, Ye Cao, Chao-Hui Yeh, Heng-Jui Liu, Eugene A. Eliseev, Anna N. Morozovska, Jiunn-Yuan Lin, Yi-Chun Chen, Ming-Wen Chu, Po-Wen Chiu, Ya-Ping Chiu, Long-Qing Chen, Chung-Lin Wu and Ying-Hao Chu Ferroelectric Control of the Conduction at the LaAlO3/SrTiO3 Heterointerface Advanced Materials 25

Version of Record online: 13 MAY 2013 | DOI: 10.1002/adma.201300757

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Modulation of band bending at a complex oxide heterointerface by a ferroelectric layer is demonstrated. The as-grown polarization (Pup) leads to charge depletion and consequently low conduction. Switching the polarization direction (Pdown) results in charge accumulation and enhances the conduction at the interface. The metal–insulator transition at a conducting polar/nonpolar oxide heterointerface can be controlled by ferroelectric doping.

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